peptic 
pericentricus 
pep'tic (merrixds, promoting diges- 
tion) Fer’ments, those enzymes 
which convert proteids into pep- 
tones. 
Pep’tones (zeros, cooked), albumi- 
noids after being acted on by fer- 
ments, as Proteids, which are the 
final result of their action; they 
are present in germinating seeds ; 
peptoni’sing, applied to enzymes 
so acting. 
per-, in Latin compounds increases 
their force as per-similis, very 
like. 
Perapet’alum, + (zepi, about + Prra- 
LUM), any appendage to a petal, a 
synonym of NectaRityma and Pa- 
RAPETALUM ; Peraphyl’lum (@vA)or, 
a leaf) = PARAPHYLLUM. 
percur’rent (percurrens, running 
through), extending throughout 
the entire length. 
Perem’bryum (epi, about, éuPpvor, 
an embryo), that part of a mono- 
cotyledonous embryo investing the 
plumule and radicle, not externally 
distinguishable. 
Perench’yma (ipa, a sack, éyxuua, 
an infusion), cellular tissue con- 
taining starchy matter (Stormonth). 
peren’nate, peren’nans (Lat.), peren- 
na’ting = peren’nial, peren'nis (Lat. ), 
lasting the whole year through ; 
Perennial, is a plant which lasts 
several years, not perishing nor- 
mally after once flowering and 
fruiting ; ~ Herb, the above ground 
portion dies each year, the root 
persisting ; ~ Mon’ocarp, applied 
by Mobius to such plants as Agave 
americana, Linn., which live long, 
but die after once flowering. 
per’fect, perfec'tus (Lat., complete), 
(1) applied to a flower which is 
hermaphrodite; (2) of an organ 
which has all its constituent mem- 
bers. 
perfo’liate, perfolia'tus (per, through, 
folium, a leaf), used when a stem 
apparently passes through a leaf, 
asin Bupleurum perfoliatum, Linn. 
per’forate, perfora'tus (Lat., pierced), 
pierced through, or having trans- 
lucent dots which look like little 
holes, as in Hypericum perforatum 
Linn. 
perfos’sus (Lat., dug or pierced 
through), perfoliate. 
perfu’sus (Lat., poured over), com- 
pletely covered. 
pergame’neous, -neus (pergamena, 
parchment), like parchment in 
texture; pergamenta’ceous, -ceus 
( + aceous), resembling parchment. 
Perian’dra, pl. (7epl, about, avip, 
dvdpos, a man), the bracts of the 
male inflorescence in Mosses ; 
perian’dricus (dvdprxds, manly), used. 
of a nectary when it is ranged 
round the stamens; Per‘ianth, 
Perian'thium (d&vOos, a flower), (1) 
the floral envelopes, calyx or cor- 
olla, or both ; (2) in Hepaticae the 
inflated envelope surrounding the 
fertilised archegonium, the CoLE- 
SULE or vaginule; perian’theus, 
perianthia’nus, relating to or pos- 
sessing a perianth : Perianthoma‘nia 
(wavia, madness), an abnormal mul- 
tiplication of perianth segments ; 
periax’ial (G&wy, an axle) Wood, 
the so-called outer wood, as in the 
stems of Bignoniaceae. 
Periblaste’sis (+ BuasTests), the en- 
velopment of gonidia by surround- 
ing tissue. 
Per'iblem (mepi8\ynua, clothing), a 
layer of nascent cortex beneath 
the epidermis. 
pericalyc’ius (epi, about + Cayx), 
= PERISTAMINEUS; Pericam’bium 
(+ Campium), thin walled cells of 
the central cylinder in contact with 
the inner face of the endodermis ; 
the pericycle ; Per’icarp, Pericar’p- 
iwm (caps, fruit), (1) the wall of a 
fructified ovary; (2) applied also 
to the wall of the capsule in 
Mosses; (3) improperly used of 
the protective husks surrounding 
certain fruits; adj. pericar’pic, 
pericar’pial, pericarpia'lis; peri- 
cen’tral (xévrpov, a sharp point) 
Cell = AvxiLIARY CELL; Peri- 
car’yoplasm = PERIKARYOPLASM ; 
pericen’tricus, applied to perigyn- 
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